Describe the AIM-9M Sidewinder.

• A. A solid fuel rocket propelled air-to-ground missile with imaging infrared guidance.
• B. A air-to-ground missile using imaging infrared guidance.
• C. A supersonic, air-to-air weapon, with a passive infrared target detection, proportional navigation guidance, and torque-balance control system.
• D. A long-range air-to-air missile using inertial guidance.

Answer: (C)

The AIM-9M Sidewinder is a short-range, supersonic air-to-air missile that relies on a passive infrared seeker to detect and home in on the target’s heat signature. It uses proportional navigation guidance, which steers the missile toward the target by keeping the line of sight rotating at a controlled rate, helping it close the gap efficiently. For flight control, it employs a torque-balance control system, which manages the missile’s attitude and steering with the available actuators to maintain stability and accuracy during the pursuit.

This description fits because the Sidewinder is not an air-to-ground weapon, not guided by imaging infrared (it uses a single, non-imaging IR seeker), and not guided inertially. The combination of air-to-air role, passive infrared detection, PN guidance, and torque-balance control is characteristic of the AIM-9M Sidewinder.